EP1162032B1 - Handwerkzeugmaschine, insbesondere Betonschleifer - Google Patents

Handwerkzeugmaschine, insbesondere Betonschleifer Download PDF

Info

Publication number
EP1162032B1
EP1162032B1 EP20010111818 EP01111818A EP1162032B1 EP 1162032 B1 EP1162032 B1 EP 1162032B1 EP 20010111818 EP20010111818 EP 20010111818 EP 01111818 A EP01111818 A EP 01111818A EP 1162032 B1 EP1162032 B1 EP 1162032B1
Authority
EP
European Patent Office
Prior art keywords
sealing element
power tool
portable power
tool according
protective hood
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP20010111818
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1162032A2 (de
EP1162032A3 (de
Inventor
Manfred Schuele
Guenter Schaal
Albert Kleider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1162032A2 publication Critical patent/EP1162032A2/de
Publication of EP1162032A3 publication Critical patent/EP1162032A3/de
Application granted granted Critical
Publication of EP1162032B1 publication Critical patent/EP1162032B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor

Definitions

  • the invention relates to a hand tool, in particular a concrete grinder, the genus defined in the preamble of claim 1.
  • DE-AS 1085 064 is a hand tool, in particular concrete grinder, with a motor-driven tool for machining a workpiece and a protective cover surrounding the tool, which carries a resilient sealing element at the bottom, with the protective cover for sealing on the surface of the workpiece can be placed, wherein the sealing element is held by means of at least one flexible element on the guard.
  • the flexible element is connected via separate fastening elements in each case with the protective cover and the sealing element. This type of connection is complex and not sufficiently dustproof, so that there is expected the escape of annoying dust.
  • the hand tool according to the invention with the features of claim 1 has the advantage that the guard itself can still be made of metal and nevertheless a resilience in this area is created due to the resilient support of the sealing element.
  • the bristles of a designed as a sealing brush sealing element are thereby less stressed, whereby the life of such a sealing element is increased.
  • Another advantage is that the Dichtelemet can be replaced quickly and easily without the need for special tools. Due to the resilient support, any tilting tendency of the bristles of a sealing element in the form of a sealing brush is reduced and thus an easier operation of the hand tool machine is achieved.
  • the motor housing 12 includes an unspecified electric motor.
  • the gear housing 14 includes an angle gear 16 with a right angle to the motor housing 12 arranged work spindle 18 which is rotatably supported in the gear housing 14 via an upper spindle bearing 19 and a lower spindle bearing 20.
  • the outer spindle bearing 20 is seated with its outer ring in a neck portion 22 and engages with its inner ring, the work spindle 18.
  • On the outer ring of the spindle bearing 20 is axially supported a concave away from the spindle bearing 20 sealing washer 24 in the form of a plate spring, on the work spindle 18, with this is circulating, held.
  • At the side facing away from the spindle bearing 20 side of the sealing washer 24 is axially about a hat-shaped cover 26, which also sits on the work spindle 18.
  • a small axial gap 28th formed, which is dimensioned so that the cover plate 26 does not touch the neck portion 22 during tumbling movements of the lower portion of the work spindle 18.
  • the work spindle 18 carries at its end a lower screw flange 32 which holds a tool 34, e.g. a grinding wheel, in particular pot grinding wheel, clamped against an upper support flange 36.
  • a tool 34 e.g. a grinding wheel, in particular pot grinding wheel
  • the neck portion 22 is encompassed by the flange 38 of a protective hood 40 axially fixed to a shoulder 23 of the neck portion 22, e.g. by means of screws or the like. Fasteners is attached.
  • the protective cover 40 has openings which are not further described for generating a secondary air flow, by means of which excessive underpressure or high pressure fluctuations are prevented.
  • the protective hood 40 has at its lower edge region 39 a resilient sealing element 42, with which the hand tool 10 is seated on the surface during machining, in particular of the surface of a workpiece not further shown.
  • the sealing element 42 prevents leakage of particles formed during machining of the workpiece, dust or the like. below the lower edge of the sealing element 42 to the outside.
  • the sealing element 42 can be designed diverse.
  • the sealing element 42 is in each case designed as a sealing brush 43, which is e.g. a curved U-profile strip 45, between the legs 47, 48 a series of bristles 46 is clamped, whereby a brush is formed, which is sufficiently stable that it can support the weight of the power tool without being damaged or destroyed become.
  • the sealing element 42 by means of a flexible member 50 resiliently on the protective cover 40 and held such that the sealing element 42 without tools, if necessary is interchangeable.
  • This resilient support results for this sealing element 42 a low stress on the bristles 46 and a long life.
  • a certain adaptation of the sealing element 42 to surface differences and thus a tolerance adjustment may result due to the resilient support.
  • the spring behavior can be adjusted so that the sealing element 42 is resiliently pressed against the surface to be machined, with the lifting of the power tool 10 from the workpiece, the sealing element 42 automatically returns due to the elastic return to the starting position.
  • the sealing element 42 can spring not only in the axial direction due to the resilient support, but also obliquely thereto. As a result, the handheld power tool 10 can be kept somewhat oblique, at least within limits, without this causing the all-round tight fit of the protective hood 40 with the sealing element 42 on the workpiece surface. Due to the resilient support results in a lower tendency to tilt of the bristles 46, thereby simplifying the handling of the power tool 10th
  • the edge region 39 of the protective hood 40 has a lower, inwardly projecting retaining edge 51.
  • This retaining edge 51 delimits on the underside an approximately groove-like circumferential ring receiver 52 of the edge region 39, which is located on the inside thereof and is open towards the inside.
  • the sealing element 42 is formed in the first embodiment as an open, circumferential strip portion 62 which is in the inner edge portion 39, in particular in the ring receiver 52, the protective cover 40 loose and inserted such that the not visible here ends of the strip portion 62nd collide against each other and / or interconnected.
  • the strip part 62 can be inserted with radial bias in the ring receiver 52.
  • the sealing element 42 in the form of the strip part 62 has an outwardly projecting edge portion 63, which is, for example, an integral part of the U-profile strip 45.
  • the sealing element 42 is supported with this edge portion 63 from above to the lower retaining edge 51 of the protective cover 40, wherein the sealing element 42 is pressed in the shape of the strip portion 62 by the flexible member 50 with the edge portion 63 against the retaining edge 51.
  • the same sealing element 42 is also shown in the form of a strip portion 62 of the same kind that this still has a towering web 64 on the inside. Also shown in Fig. 1 to 3 first embodiment of the sealing element 42 in the form of the strip portion 62 may, in addition to the edge portion 63, be provided with such a towering web 64. The edge portion 63 and optionally the web 64 serve to ensure that the flexible element 50 can be supported thereon.
  • the at least one flexible element 50 is formed of an open, circumferential spring member 70 which is supported on the protective cover 40 and presses on the edge portion 63 of the sealing element 42 and this against the retaining edge 51 of Protective hood 40 presses.
  • the spring member 70 is inserted with radial prestressing and thus from the inside into the protective hood 40, for example in the region of the annular receptacle 52, that the ends of the spring member 70 not shown abut against each other and / or connected to each other, whereby the radial bias voltage is prevented from falling , If the sealing element 42 in the form of the strip part 62 analogous to the third embodiment in Fig. 5 also provided with a towering web 64, the spring member 70 may rest in Fig. 2 and 3 also on such a towering web 64.
  • the at least one spring member 70 is formed from a shaped spring which has a zigzag course around the edge portion 39 of the protective cover 40 in the embodiment shown, said zigzag shaped spring on the one hand on the protective cover 40 and on the other hand from above forth on the strip portion 62 presses.
  • the spring member 70 may also be e.g. be formed as about wavy, meandering or the like shaped tension spring.
  • the sealing element 42 in the form of the sealing brush 43 may be designed as in the embodiment in Fig. 2 and 3, with or without laterally projecting edge portion 63.
  • the at least one flexible element 50 here consists of a rubber-like flexible element and is in particular as existing rubber Carrier 80 is formed, which is provided with the sealing element 42.
  • the sealing element 42 is held in this carrier 80 fixed or, if desired, also replaceable.
  • the carrier 80 in turn is fixed to the edge portion 39, such as a downwardly facing ring member 53, the cover 40 or held releasably instead for replacement purposes, this being done, for example, that the carrier 80 by taking advantage of the elasticity of the rubber material with prestressing clamping at the edge region 39, in particular ring member 53, is held. It is understood that other mounting options are within the scope of the invention.
  • the carrier 80 together with the sealing element 42 is closed to form a ring component. If the carrier 80 is pushed in the manner described on the ring member 53, the carrier 80 may be designed together with the sealing element 42 as a closed loop from the outset ring member which is pushed onto the ring member 53 of the protective cover 40. Due to the rubber material of the wearer 80 is achieved in this embodiment, a resilient mounting of the sealing element 42 with all the advantages described.
  • the embodiment in Fig. 5 is similar to the first embodiment in Figs. 1 to 3, but wherein the flexible member 50 is formed in the form of the spring member 70 of a rubber-like flexible circumferential strip portion 71 which is inserted into the ring receiver 52.
  • the strip part 71 substantially fills the area of the ring receptacle 52, wherein it bears against both the outwardly projecting edge part 63 of the sealing element 42 and the high-projecting web 64 provided here and can be supported.
  • the rubber-like flexible strip part 71 can be fixedly connected to the sealing element 42, e.g. be glued or clamped with it.
  • the strip portion 71 may also be a loose, self-contained component with respect to the sealing element 42.
  • the strip part 71 is also loose and inserted in such a way that the ends of the strip part 71 abut one another and / or are connected to one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP20010111818 2000-06-07 2001-05-16 Handwerkzeugmaschine, insbesondere Betonschleifer Expired - Lifetime EP1162032B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000128128 DE10028128A1 (de) 2000-06-07 2000-06-07 Handwerkzeugmaschine, insbesondere Betonschleifer
DE10028128 2000-06-07

Publications (3)

Publication Number Publication Date
EP1162032A2 EP1162032A2 (de) 2001-12-12
EP1162032A3 EP1162032A3 (de) 2003-10-22
EP1162032B1 true EP1162032B1 (de) 2007-10-24

Family

ID=7644953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010111818 Expired - Lifetime EP1162032B1 (de) 2000-06-07 2001-05-16 Handwerkzeugmaschine, insbesondere Betonschleifer

Country Status (3)

Country Link
EP (1) EP1162032B1 (ja)
JP (1) JP2002018693A (ja)
DE (2) DE10028128A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool
US11931851B2 (en) 2019-10-23 2024-03-19 Black & Decker Inc. Pole sander

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007013705U1 (de) * 2007-10-01 2009-02-19 Mafell Ag Bearbeitungswerkzeug
CN102717312B (zh) * 2012-07-19 2015-08-26 倪玉萍 一种适合在任意阴角处使用的无尘打磨机
JP5998331B2 (ja) * 2012-07-31 2016-09-28 極東産機株式会社 内装施工用パテ研削工具
US9649738B2 (en) 2012-11-29 2017-05-16 Oy Kwh Mirka Ab Arrangement and method for grinding spherical products
FI125878B (fi) 2013-06-13 2016-03-31 Dg Diving Group Ltd Laite ja menetelmä vedenalaisen pinnan käsittelemiseksi
EP3300839A1 (de) * 2016-09-28 2018-04-04 Hilti Aktiengesellschaft Staubhaube für ein schleifgerät
CN112388468B (zh) * 2019-08-16 2022-12-13 博世电动工具（中国）有限公司 手持式工具机
GB2590684A (en) * 2019-12-23 2021-07-07 Black & Decker Inc Pole sander

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1085064B (de) * 1959-03-23 1960-07-07 Gustav Albrecht Schutz- und Absaugehaube fuer Schleif- und Poliermaschinen
US4697389A (en) * 1986-05-13 1987-10-06 Romine Richard A Dust-confining vacuum sander
RU2011505C1 (ru) * 1990-04-09 1994-04-30 Олег Николаевич Антонов Ограждение торцевого обрабатывающего инструмента
US6027399A (en) * 1998-02-27 2000-02-22 Stewart; Kerry Clean grinding system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11931851B2 (en) 2019-10-23 2024-03-19 Black & Decker Inc. Pole sander
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool

Also Published As

Publication number Publication date
JP2002018693A (ja) 2002-01-22
DE50113160D1 (de) 2007-12-06
EP1162032A2 (de) 2001-12-12
DE10028128A1 (de) 2001-12-13
EP1162032A3 (de) 2003-10-22

Similar Documents

Publication Publication Date Title
EP1162032B1 (de) Handwerkzeugmaschine, insbesondere Betonschleifer
DE68908168T2 (de) Uhr mit einer drehbaren Lünette.
DE3224208A1 (de) Handgelenkstuetze
DE102005063017B4 (de) Handgeführtes Elektrowerkzeug mit einer Schutzhaube
DE69422293T2 (de) Kugellager für schere und damit versehene schere
DE102013012746A1 (de) Handgeführtes Arbeitsgerät
EP3113894A1 (de) Bauteil zur herstellung einer formschlüssigen nietverbindung eines werkzeugs
DE10343060A1 (de) Handwerkzeugmaschine mit Schutzhaube
DE102012201624A1 (de) Sägeblatt
EP3416780B1 (de) Winkelschleifer-staubhaube
DE3642005C1 (de) Vorrichtung zum Schneiden von folienartigen Werkstoffen
WO2021136624A1 (de) Handwerkzeugmaschinenvorrichtung, handwerkzeugmaschine mit der handwerkzeugmaschinenvorrichtung und zubehör mit der handwerkzeugmaschinenvorrichtung
DE68914486T2 (de) Halterung von Schabeblättern zum Reinigen von Förderbändern.
DE102008002548A1 (de) Werkzeugmaschine, insbesondere Handwerkzeugmaschine
DE102014205445A1 (de) Kreissägeblatt
DE202014100456U1 (de) Werkstückhalter
WO1998006539A1 (de) Schwingschleifer
EP0261374A1 (de) Filz-Gleitringdichtung für Handwerkzeugmaschinen
DE19914956C2 (de) Elektromotorisch antreibbares Schleifgerät
EP3416779B1 (de) Winkelschleifer-staubhaube
DE2759694C2 (ja)
EP0224634A1 (de) Gleitringdichtung
DE202019105846U1 (de) Elektrohandwerkzeugmaschine
EP1858668B1 (de) Handwerkzeugmaschine
CH617085A5 (en) Dental handpiece driven by an air turbine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RIC1 Information provided on ipc code assigned before grant

Ipc: 7B 24B 23/02 B

Ipc: 7B 24B 55/05 A

Ipc: 7B 24B 55/10 B

17P Request for examination filed

Effective date: 20040422

AKX Designation fees paid

Designated state(s): CH DE FR GB LI

17Q First examination report despatched

Effective date: 20060717

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: SCINTILLA AG, DIREKTION

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 50113160

Country of ref document: DE

Date of ref document: 20071206

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20080206

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20080725

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20100324

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20100608

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20100525

Year of fee payment: 10

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20110516

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110531

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20120131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110516

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20120723

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131203

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50113160

Country of ref document: DE

Effective date: 20131203